PHP 5.4 version upgrade: How to use short_open_tag to enable short tag syntax

PHP 5.4 version upgrade: How to use short_open_tag to enable short tag syntax

In the development process of PHP, we often encounter the use of short tag syntax. However, prior to PHP 5.4, short_open_tag was disabled by default. This brings some inconvenience to developers. This article explains how to use short tag syntax by enabling short_open_tag.

First, we need to make sure that PHP version 5.4 or higher is installed. If you haven't upgraded yet, you can download the latest version of PHP from the official PHP website.

After upgrading to PHP 5.4 version, we need to modify the php.ini configuration file to enable short_open_tag. First, find the directory where the php.ini configuration file is located. Normally, it is located in the "etc" folder under the PHP installation directory.

After finding the php.ini file, open it with a text editor and search for the "short_open_tag" option. By default, the value of this option should be "Off". Change it to "On", then save and close the file.

Next, you need to restart your web server for the changes to take effect. You can then use the short markup syntax in your code.

The following is a simple code example that shows how to use short tag syntax to output "Hello, World!":

<?php
  echo "Hello, World!";
?>

或者使用短标记语法：

<?
  echo "Hello, World!";
?>

By enabling short_open_tag, you can more conveniently Use short markup syntax. However, it is important to note that using short markup syntax may conflict with markup from other languages ​​or template engines, so caution is recommended when writing multi-language or cross-platform code.

To summarize, by modifying the php.ini configuration file and restarting the web server, we can enable short_open_tag to use short tag syntax. This improves code readability and development efficiency. Hope this article can help you.

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